<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.w3.org/1999/xhtml">
<head>
    <meta charset="UTF-8">
    <title>错误页面</title>
    <style>
        .msg{
            color: red;
        }
    </style>
</head>
<body>
<h4 class="msg" th:text="${msg}">123</h4>
</body>
</html>